1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /**************************************************************************** 3 * Driver for Solarflare network controllers and boards 4 * Copyright 2006-2011 Solarflare Communications Inc. 5 */ 6 7 #ifndef EF4_MDIO_10G_H 8 #define EF4_MDIO_10G_H 9 10 #include <linux/mdio.h> 11 12 /* 13 * Helper functions for doing 10G MDIO as specified in IEEE 802.3 clause 45. 14 */ 15 16 #include "efx.h" 17 18 static inline unsigned ef4_mdio_id_rev(u32 id) { return id & 0xf; } 19 static inline unsigned ef4_mdio_id_model(u32 id) { return (id >> 4) & 0x3f; } 20 unsigned ef4_mdio_id_oui(u32 id); 21 22 static inline int ef4_mdio_read(struct ef4_nic *efx, int devad, int addr) 23 { 24 return efx->mdio.mdio_read(efx->net_dev, efx->mdio.prtad, devad, addr); 25 } 26 27 static inline void 28 ef4_mdio_write(struct ef4_nic *efx, int devad, int addr, int value) 29 { 30 efx->mdio.mdio_write(efx->net_dev, efx->mdio.prtad, devad, addr, value); 31 } 32 33 static inline u32 ef4_mdio_read_id(struct ef4_nic *efx, int mmd) 34 { 35 u16 id_low = ef4_mdio_read(efx, mmd, MDIO_DEVID2); 36 u16 id_hi = ef4_mdio_read(efx, mmd, MDIO_DEVID1); 37 return (id_hi << 16) | (id_low); 38 } 39 40 static inline bool ef4_mdio_phyxgxs_lane_sync(struct ef4_nic *efx) 41 { 42 int i, lane_status; 43 bool sync; 44 45 for (i = 0; i < 2; ++i) 46 lane_status = ef4_mdio_read(efx, MDIO_MMD_PHYXS, 47 MDIO_PHYXS_LNSTAT); 48 49 sync = !!(lane_status & MDIO_PHYXS_LNSTAT_ALIGN); 50 if (!sync) 51 netif_dbg(efx, hw, efx->net_dev, "XGXS lane status: %x\n", 52 lane_status); 53 return sync; 54 } 55 56 const char *ef4_mdio_mmd_name(int mmd); 57 58 /* 59 * Reset a specific MMD and wait for reset to clear. 60 * Return number of spins left (>0) on success, -%ETIMEDOUT on failure. 61 * 62 * This function will sleep 63 */ 64 int ef4_mdio_reset_mmd(struct ef4_nic *efx, int mmd, int spins, int spintime); 65 66 /* As ef4_mdio_check_mmd but for multiple MMDs */ 67 int ef4_mdio_check_mmds(struct ef4_nic *efx, unsigned int mmd_mask); 68 69 /* Check the link status of specified mmds in bit mask */ 70 bool ef4_mdio_links_ok(struct ef4_nic *efx, unsigned int mmd_mask); 71 72 /* Generic transmit disable support though PMAPMD */ 73 void ef4_mdio_transmit_disable(struct ef4_nic *efx); 74 75 /* Generic part of reconfigure: set/clear loopback bits */ 76 void ef4_mdio_phy_reconfigure(struct ef4_nic *efx); 77 78 /* Set the power state of the specified MMDs */ 79 void ef4_mdio_set_mmds_lpower(struct ef4_nic *efx, int low_power, 80 unsigned int mmd_mask); 81 82 /* Set (some of) the PHY settings over MDIO */ 83 int ef4_mdio_set_link_ksettings(struct ef4_nic *efx, 84 const struct ethtool_link_ksettings *cmd); 85 86 /* Push advertising flags and restart autonegotiation */ 87 void ef4_mdio_an_reconfigure(struct ef4_nic *efx); 88 89 /* Get pause parameters from AN if available (otherwise return 90 * requested pause parameters) 91 */ 92 u8 ef4_mdio_get_pause(struct ef4_nic *efx); 93 94 /* Wait for specified MMDs to exit reset within a timeout */ 95 int ef4_mdio_wait_reset_mmds(struct ef4_nic *efx, unsigned int mmd_mask); 96 97 /* Set or clear flag, debouncing */ 98 static inline void 99 ef4_mdio_set_flag(struct ef4_nic *efx, int devad, int addr, 100 int mask, bool state) 101 { 102 mdio_set_flag(&efx->mdio, efx->mdio.prtad, devad, addr, mask, state); 103 } 104 105 /* Liveness self-test for MDIO PHYs */ 106 int ef4_mdio_test_alive(struct ef4_nic *efx); 107 108 #endif /* EF4_MDIO_10G_H */ 109